Frederika Kokernoot was the eldest of the six children of Matthijs Kokernoot and Mietje Gompers. Her father died already at the age of 47 in 1911, but her mother, brother and five sisters were all killed during the Shoah. Frederika worked as diamond cutter and as childcare worker. On 7 June 1928 she married Hijman Mouwes in Amsterdam, a son of David Mouwes and Betje van Praag. The couple had no ch…